<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width, initial-scale=1">
	<title></title>
	<style type="text/css">
		*{
			margin: 0;
			padding: 0;
		}
		.box{
			width: 1000px;
			height: 30px;
			background-color: #eee;
			margin: 10px auto;
			padding-left: 900px;
		}
		.box>div{
			color: #777;
			float: left;
			margin-left: 20px;
		}
		.one{
			position: relative;
		}
		.one>div{
			width: 200px;
			height: 200px;
			background-image: url(../小猫.jpg);
			background-position: -268px -99px;
			display: none;
			position: absolute;
			left: 50%;
			margin-left:-100px ;
		}
		.one:hover{
			color: red;
			text-decoration: underline;
		}
		.one:hover>div{
			display: block;
		}
	</style>
</head>
<body>
	<div class="box">
		<div class="one">
		<span>手机版</span>
		<div></div>
		</div>
		<div>淘宝网</div>
		<div>网页无障碍</div>
		
	</div>
</body>
</html>